Nearly 30% of global aluminum consumption is recycled aluminum. Developed countries use and consume aluminum in large quantities, making North America, Japan and Europe become the industrial centers of aluminum recycling. As China’s aluminum production and consumption have soared in the past ten years, the aluminum recycling volume now ranks among the top in the world. The geographical distribution of aluminum recycling production is mainly in North America, Western Europe, and East Asia.
The recycled aluminum scrap can be collectively referred to as the secondary resources of aluminum, such as scrap aluminum doors and windows, aluminum-containing scraps from automobiles, electrical appliances, and machinery, aluminum wires, cans, machining scraps, etc., which are commonly referred to as scrap aluminum. The recycling of scrap aluminum and scrap cans from end-of-life automobiles are two important raw material areas.
At present, about 80% of the recycled aluminum alloy produced in the world is used in the production of castings and forgings in the automobile manufacturing industry. According to reports, the highest recycling rate of aluminum scrap in automobiles in the world has reached 95%. The recycling of waste aluminum cans has also made great progress, and the global average recycling rate is above 50%. In 2001, the recovery rate of aluminum cans was 55% in the United States, 83% in Japan, 45% in Europe, and the highest in Switzerland and Sweden, 91% and 88%, respectively.
The main impurities in the scrap are Si, Fe, Ti, and Mg. The classification of the scrap before smelting is particularly important. If it is inseparable, the method often used is to transfer these impurities into the casting alloy. Many companies also use primary aluminum to dilute these impurities to meet the composition requirements of cast aluminum alloys.
We provide refining agents, ceramic foam filters, and degassing filtration equipment for regenerated aluminum alloy smelters to solve the gas and impurities in the molten aluminum.